API integration and REST API development

A REST API is an interface through which other applications securely read and write data in your system. We design and implement it with versioning, authentication and rate limits, and describe it in OpenAPI so developers on the other side can use it without guessing. We can also connect external services such as payments, couriers, email or maps. We work in Laravel, Node.js and Python.

We start by establishing who will use the API and which data and operations are needed. Then we write an OpenAPI specification and agree on it before implementation begins. Next we build the endpoints, test them and prepare documentation. We work iteratively, so you can try working pieces. Timing depends on the number of resources, business rule complexity and the number of integrated services, and we give a date after analysis.

Price depends on the number of endpoints and resources, business rule complexity, security requirements (such as OAuth 2.0), performance under heavy traffic and the documentation we deliver. For a third-party service, the quality of its API, its limits and stability matter. We start with an analysis, since the gap between a well-documented API and an erratic one can be significant. We split the scope into stages so you can begin with the most important functions.

We use authentication (such as OAuth 2.0 or tokens), permission checks, input validation, rate limits and encrypted connections, with security practices aligned with ISO/IEC 27001. Changes go through versioning so existing clients keep working after an update, and deprecated features are flagged in advance. We also add logging and monitoring so anomalies are visible. Which of these apply depends on how sensitive the exposed data is.

Yes, OpenAPI documentation is part of the delivery, along with the code, which belongs to you. Thanks to it another team, a partner or we can continue developing the API. After launch we can take care of monitoring, updates, new endpoints and changes in integrated services. Webhooks and events also let you add new scenarios without rebuilding the foundations.